<template>
  <div class="app-container">
    <el-form label-width="120px">
      <el-form-item label="讲师名称">
        <el-input v-model="teacher.name"/>
      </el-form-item>
      <el-form-item label="讲师排序">
        <el-input-number v-model="teacher.sort" controls-position="right" min="0"/>
      </el-form-item>
      <el-form-item label="讲师头衔">
        <el-select v-model="teacher.level" clearable placeholder="请选择">
          <!--
            数据类型一定要和取出的json中的一致，否则没法回填
            因此，这里value使用动态绑定的值，保证其数据类型是number
          -->
          <el-option :value="1" label="高级讲师"/>
          <el-option :value="2" label="首席讲师"/>
        </el-select>
      </el-form-item>
      <el-form-item label="讲师资历">
        <el-input v-model="teacher.career"/>
      </el-form-item>
      <el-form-item label="讲师简介">
        <el-input v-model="teacher.intro" :rows="10" type="textarea"/>
      </el-form-item>

      <!-- 讲师头像：TODO -->
      <el-form-item label="讲师头像">
        <pan-thumb :image="teacher.avatar"/>
        <!-- 文件上传按钮 -->
        <el-button type="primary" icon="el-icon-upload" @click="imagecropperShow=true">更换头像
        </el-button>
        <!--
        v-show：是否显示上传组件
        :key：类似于id，如果一个页面多个图片上传控件，可以做区分
        :url：后台上传的url地址
        @close：关闭上传组件
        @crop-upload-success：上传成功后的回调 -->
        <image-cropper
          v-show="imagecropperShow"
          :width="300"
          :height="300"
          :key="imagecropperKey"
          :url="BASE_API+'eduoss/file/upload'"
          field="file"
          @close="close"
          @crop-upload-success="cropSuccess"/>
      </el-form-item>
      <el-form-item>
        <el-button :disabled="saveBtnDisabled" type="primary" @click="saveOrUpdate">保存</el-button>
      </el-form-item>

    </el-form>
  </div>
</template>

<script>
  import teacher from '@/api/edu/teacher'
  import ImageCropper from '@/components/ImageCropper'
  import PanThumb from '@/components/PanThumb'
  const defaultForm = {
    name: '',
    sort: 0,
    level: 1,
    career: '',
    intro: '',
    avatar: process.env.OSS_PATH + '/timg.jpg'
  }
  export default {
      name: "form",
      components:{
        ImageCropper,
        PanThumb
      },
      data() {
        return {
          teacher: defaultForm,
          saveBtnDisabled: false, // 保存按钮是否禁用,
          BASE_API: process.env.BASE_API, // 接口API地址
          imagecropperShow: false, // 是否显示上传组件
          imagecropperKey: 0 // 上传组件id
        }
      },
      created(){
        console.log('created')
        if (this.$route.params && this.$route.params.id) {
          const id = this.$route.params.id
          this.fetchDataById(id)
        }
      },
      methods: {
        init(){
          if (this.$route.params && this.$route.params.id) {
            const id = this.$route.params.id
            this.fetchDataById(id)
          }else{
            this.teacher = { ...defaultForm }
          }
        },
        saveOrUpdate() {
          this.saveBtnDisabled = true
          if (!this.teacher.id) {
            this.saveData()
          } else {
            this.updateData()
          }

        },
        // 保存
        saveData() {
          teacher.save(this.teacher).then(response =>{
             return this.$message({
               type: 'success',
               message: '保存成功!'
             })
          }).then(response => {
               this.$router.push({ path: '/edu/teacher/list' })
             }).catch((response) => {
               // console.log(response)
               this.$message({
                 type: 'error',
                 message: '保存失败'
               })
           });
        },
        fetchDataById(id){
          teacher.getById(id).then(response=>{
            this.teacher = response.data.item
          }).catch((response) =>{
            this.$message({
              type: 'error',
              message: '获取数据失败'
            })
          })
        },
        updateData(){
          this.saveBtnDisabled = true;
          teacher.updateById(this.teacher).then(response =>{
            return this.$message({
              type: 'success',
              message: '修改成功!'
            })

          }).then(response => {
            this.$router.push({ path: '/edu/teacher/list' })
          }).catch((response) => {
            // console.log(response)
            this.$message({
              type: 'error',
              message: '保存失败'
            })
          });
        },
        cropSuccess(data) {
          console.log(data)
          this.imagecropperShow = false
          this.teacher.avatar = data.url
          // 上传成功后，重新打开上传组件时初始化组件，否则显示上一次的上传结果
          this.imagecropperKey = this.imagecropperKey + 1
        },
        // 关闭上传组件
          close() {
            this.imagecropperShow = false
            // 上传失败后，重新打开上传组件时初始化组件，否则显示上一次的上传结果
            this.imagecropperKey = this.imagecropperKey + 1
        },
      }
    }
</script>

<style scoped>

</style>
